U.S. Army 3rd U.S. Infantry Regiment (The Old Guard) sentinels conduct an inspection during the Gold Star Mother’s Day Observance at Arlington National Cemetery in Arlington, Va., Sept. 27, 2015. Along with guarding the Tomb of the Unknown Soldier, the Regiment also participates in events like the observance at the cemetery year-round. (U.S. Air Force photo by Staff Sgt. Natasha Stannard/Released)